Status

()

For bugs in Firefox Desktop, the Mozilla Foundation's web browser. For Firefox user interface issues in menus, developer tools, bookmarks, location bar, and preferences. Many Firefox bugs will either be filed here or in the Core product. (more info)

I used to have the search box in the hamburger menu. I was able to use Ctrl-K to pop open the menu, enter my search in the search box, hit enter, and have the search open in a new tab.
At some point the search box disappeared from the hamburger menu, and Ctrl-K now focuses on the address bar.
I can re-add the search box to the overflow panel using the menu customization tool.
However, Ctrl-K does not open the overflow panel.